Here is a list of all functions, variables, defines, enums, and typedefs with links to the files they belong to:

### - u -

- SDL_UCS4ToUTF8() : SDL_stdinc.h
- SDL_UINT64_C : SDL_stdinc.h
- SDL_uitoa() : SDL_stdinc.h
- SDL_ulltoa() : SDL_stdinc.h
- SDL_ultoa() : SDL_stdinc.h
- SDL_UnbindAudioStream() : SDL_audio.h
- SDL_UnbindAudioStreams() : SDL_audio.h
- SDL_UnionFRect : SDL_oldnames.h
- SDL_UnionRect : SDL_oldnames.h
- SDL_UnloadObject() : SDL_loadso.h
- SDL_UnlockAudioStream() : SDL_audio.h
- SDL_UnlockJoysticks() : SDL_joystick.h
- SDL_UnlockMutex() : SDL_mutex.h
- SDL_UnlockProperties() : SDL_properties.h
- SDL_UnlockRWLock() : SDL_mutex.h
- SDL_UnlockSpinlock() : SDL_atomic.h
- SDL_UnlockSurface() : SDL_surface.h
- SDL_UnlockTexture() : SDL_render.h
- SDL_UnmapGPUTransferBuffer() : SDL_gpu.h
- SDL_unsetenv_unsafe() : SDL_stdinc.h
- SDL_UnsetEnvironmentVariable() : SDL_stdinc.h
- SDL_Unsupported : SDL_error.h
- SDL_UNUSED : SDL_begin_code.h
- SDL_UpdateGamepads() : SDL_gamepad.h
- SDL_UpdateHapticEffect() : SDL_haptic.h
- SDL_UpdateJoysticks() : SDL_joystick.h
- SDL_UpdateNVTexture() : SDL_render.h
- SDL_UpdateSensors() : SDL_sensor.h
- SDL_UpdateTexture() : SDL_render.h
- SDL_UpdateTrays() : SDL_tray.h
- SDL_UpdateWindowSurface() : SDL_video.h
- SDL_UpdateWindowSurfaceRects() : SDL_video.h
- SDL_UpdateYUVTexture() : SDL_render.h
- SDL_UploadToGPUBuffer() : SDL_gpu.h
- SDL_UploadToGPUTexture() : SDL_gpu.h
- SDL_UpperBlit : SDL_oldnames.h
- SDL_UpperBlitScaled : SDL_oldnames.h
- SDL_US_PER_SECOND : SDL_timer.h
- SDL_US_TO_NS : SDL_timer.h
- SDL_USEREVENT : SDL_oldnames.h
- SDL_utf8strlcpy() : SDL_stdinc.h
- SDL_utf8strlen() : SDL_stdinc.h
- SDL_utf8strnlen() : SDL_stdinc.h
- Uint16 : SDL_stdinc.h
- Uint32 : SDL_stdinc.h
- Uint64 : SDL_stdinc.h
- Uint8 : SDL_stdinc.h